(n.) One who favors or adheres strictly to a liturgy.

Babbitt High-Churchist Holy Willie Joseph Surface Mawworm Middle American Pecksniff Pharisee Philistine Sabbatarian Tartuffe Vicar of Bray affecter anal character bluestocking bourgeois burgher canter canting hypocrite chameleon compulsive character conformer conformist conventionalist dissembler dissimulator formularist formulist hypocrite lip server lip worshiper liturgist methodologist middle-class type model child organization man parrot pedant perfectionist pharisee pietist pious fraud plastic person poser precieuse precieux precisian precisianist precisionist purist ranter religionist religious hypocrite ritualist sacramentarian sheep sniveler snuffler spiritual humbug square teenybopper temporizer timepleaser timeserver trimmer weathercock whited sepulcher yes-man